adtools/clib2

/*
 * $Id: amiga_invertstring.c,v 1.4 2006-01-08 12:04:22 obarthel Exp $
 *
 * :ts=4
 *
 * Portable ISO 'C' (1994) runtime library for the Amiga computer
 * Copyright (c) 2002-2015 by Olaf Barthel <obarthel (at) gmx.net>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Neither the name of Olaf Barthel nor the names of contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <libraries/commodities.h>
#include <devices/keymap.h>
#include <exec/memory.h>

#include <string.h>

/****************************************************************************/

#include <proto/exec.h>
#include <proto/commodities.h>
#include <clib/alib_protos.h>

/****************************************************************************/

#include "debug.h"

/****************************************************************************/

STATIC int
do_escape(int cc)
{
    int result;

    switch(cc)
    {
        case 'n':
        case 'r':

            result = '\r';
            break;

        case 't':

            result = '\t';
            break;

        case '0':

            result = '\0';
            break;

        case '\\':
        case '\"':
        case '\'':
        case '<':

            result = cc;
            break;

        default:

            result = -1;
            break;
    }

    return(result);
}

/****************************************************************************/

STATIC ULONG
do_angle(STRPTR * strp, struct InputEvent *ie)
{
    ULONG result;
    char * cp;
    IX ix;

    /* find closing angle '>', put a null there   */
    for(cp = (*strp) ; (*cp) ; cp++)
    {
        if((*cp) == '>')
        {
            (*cp) = '\0';
            break;
        }
    }

    result = ParseIX((*strp),&ix);

    if(cp != NULL)
    {
        (*cp)    = '>';    /* fix it */
        (*strp)    = cp;    /* point to char following '>' */
    }
    else
    {
        (*strp) = cp - 1;   /* ++will point to terminating null */
    }

    if(result == 0)
    {
        /* use IX to describe a suitable InputEvent */
        ie->ie_Class        = ix.ix_Class;
        ie->ie_Code            = ix.ix_Code;
        ie->ie_Qualifier    = ix.ix_Qualifier;
    }

    return(result);
}

/****************************************************************************/

extern VOID FreeIEvents(struct InputEvent *ie);

/****************************************************************************/

struct InputEvent *
InvertString(CONST_STRPTR str, CONST struct KeyMap *km)
{
    /* bugs:
       can't escape '>'
       puts '\0' on closing angles */

    /* allocate input event for each character in string   */

    struct InputEvent * result = NULL;
    struct InputEvent * chain = NULL;
    struct InputEvent * ie;
    int cc;

    if(CxBase == NULL || str == NULL || (*str) == '\0')
        goto out;

    do /* have checked that str is not null    */
    {
        /* allocate the next ie and link it in */
        ie = AllocVec(sizeof(*ie),MEMF_ANY|MEMF_CLEAR|MEMF_PUBLIC);
        if(ie == NULL)
            goto out;

        ie->ie_NextEvent = chain;
        chain = ie;

        /* now fill in the input event   */
        cc = (*str);
        switch(cc)
        {
            case '<':

                str++;

                if(do_angle((STRPTR*)&str, ie) != 0)
                    goto out;

                break;

            case '\\':

                str++;

                cc = do_escape(*str); /* get escaped character */
                if(cc < 0)
                    goto out;

                /* fall through  */

            default:

                InvertKeyMap((ULONG) cc, ie, (struct KeyMap *)km);
                break;
        }

        str++;
    }
    while((*str) != '\0');

    result = chain;

 out:

    if(result == NULL && chain != NULL)
        FreeIEvents(chain);

    return(result);
}